This topic refers to the characteristics of cellular mobile operating systems: Android, Symbian, iPhone, Windows Phone. Present which of the mobile operating systems of cellular communication is the most secure and most susceptible to computer viruses, a qualitative methodology based on bibliographic references, data collected in books, technical manuals, information about the manufacturer and on Internet sites; to the analysis of documentary data, performed in Table. However, it is concluded that not all types of computer viruses infect mobile phones, it depends on the kernel of the operating system.